16272281 has 4 divisors (see below), whose sum is σ = 17229492. Its totient is φ = 15315072.

The previous prime is 16272257. The next prime is 16272287. The reversal of 16272281 is 18227261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5216656 + 11055625 = 2284^2 + 3325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16272281 is a prime.

It is a super-2 number, since 2×16272281² = 529574257885922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16272287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478580 + ... + 478613.

It is an arithmetic number, because the mean of its divisors is an integer number (4307373).

Almost surely, 2^16272281 is an apocalyptic number.

It is an amenable number.

16272281 is a deficient number, since it is larger than the sum of its proper divisors (957211).

16272281 is an equidigital number, since it uses as much as digits as its factorization.

16272281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957210.

The product of its digits is 2688, while the sum is 29.

The square root of 16272281 is about 4033.8915453939. The cubic root of 16272281 is about 253.4055632375.

The spelling of 16272281 in words is "sixteen million, two hundred seventy-two thousand, two hundred eighty-one".